There are many problems with this situation and a lot of question determining who is responsible for what. Additionally, this question wasn’t too clear as in if the sprinkler heads were different in the aspect of performance from what architect had specified ie. sqft coverage. If they had different mechanical properties, the sprinklers must be removed and replaced with the appropriate ones and another inspection must be done. The general contractor is responsible for this mistake because it is his job to ensure the shop drawings reflect the architectural drawings. Additionally, because the general contractor is responsible, he too must pay for the fix. The general contractor should have verified the shop drawing were done as per architectural drawings. Additionally, the general contractor should have made sure the sub-contractor was installing the correct heads on the site.
